I wasn't sure what forum to post in since I'm having the exact same problem with two different planes.

Since upgrading to Win 8 and a new computer I've been having issues with the 757 and 727.

I can start off a flight no problems locked at 30FPS, however as time goes by...maybe 15-20 minutes the frames will gradually get slower and slower until im running about ~7 or so.

Reloading plane and scenery does not help, however if I save the flight, I can exit and restart FSX right back at 30FPS for another half hour or so.

I own multiple CS products and so far the 707, 737, and 767 seem to run okay.  (I have 777 too but have never made it off the ground with it)

Other payware aircraft, (PM-DG, Cool-sky, Maddog) also run locked at 30fps no problem.


I have uninstalled and reinstalled the 727 and 757 multiple times with no change.

I have most of the various FSX tweaks enabled with no help.

I have dumbed down the graphics setting to extremely stupid levels with no change.  (planes look like 8-bit Mario brothers)

Ihave disabled virtual cabin on the 757  (not possible on 727) with no change.

I have disabled high resolution VC with no change.


Is there something specific about the 757 and 727 that might cause a memory leak where other CS planes are fine?



Thanks in advance. ;)


Intel i7 3.5Ghz
16GB RAM
NVIDIA GTZ 770